<button class="roll-nav roll-right J_tabRight"><i class="fa fa-forward"></i>
</button>
<div class="btn-group roll-nav roll-right">
    <button class="dropdown J_tabClose" data-toggle="dropdown">关闭操作<span class="caret"></span>

    </button>
    <ul role="menu" class="dropdown-menu dropdown-menu-right">
        <li class="J_tabShowActive"><a>定位当前选项卡</a>
        </li>
        <li class="divider"></li>
        <li class="J_tabCloseAll"><a>关闭全部选项卡</a>
        </li>
        <li class="J_tabCloseOther"><a>关闭其他选项卡</a>
        </li>
    </ul>
</div>
<a href="login.html" class="roll-nav roll-right J_tabExit"><i class="fa fa fa-sign-out"></i> 退出</a>